Api html pleasantries

Here is a collection of visual and functional enhancements to the API HTML interface in response to #167. It includes:

- tooltips (popovers in bootstrap parlance)
- autocompletion (bootstrap typeahead)
- a new layout for the clause fields
- the ability to save a query to local storage
- fancy background image

Some new bower packages have been added as well, so you'll want to `bower install`. 

I imagine there will be feedback that spurs on additional commits, so this is more of a maybe-pull-eventually request.